mailing list archives
RE: Level3 (3356/3549) changes routing policy
From: "Siegel, David" <Dave.Siegel () level3 com>
Date: Thu, 2 Aug 2012 13:53:38 +0000
Thanks David, you hit the nail on the head on both points.
Level 3 made the routing policy change last November, roughly 6 weeks after the acquisition of Global Crossing.
From: David Reader [mailto:david.reader () zeninternet co uk]
Sent: Thursday, August 02, 2012 6:41 AM
To: nanog () nanog org
Subject: Re: Level3 (3356/3549) changes routing policy
On Thu, 2 Aug 2012 10:33:38 +0200
Fredy Kuenzler <kuenzler () init7 net> wrote:
From my observation Level3 has recently changed their routing policy.
It seems that 3356 always prefers customer prefixes of 3549,
regardless of the AS path length. Example (seen from 3356):
is preferred over
Considering that both 2914 and 3549 are peers of 3356, and 13030 is a
customer of 3549, 3356 seems to give higher local-pref on the longer
AS-path, likely to increase traffic and revenue of their sister network 3549.
Level 3 owns both 3356 and 3549.
They're simply preferring to have their customers pay them, rather than a 3rd party.
I don't think it's suprising at all that they're doing it. If, as you think, it's only happened recently then what is
suprising is that it didn't happen sooner IMO.